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β decay and isomeric properties of neutron-rich Ca and Sc isotopes

2010; American Institute of Physics; Volume: 82; Issue: 1 Linguagem: Inglês

10.1103/physrevc.82.014311

1538-4497

H. L. Crawford, R. V. F. Janssens, P. F. Mantica, J. S. Berryman, R. Broda, M. P. Carpenter, N. Cieplicka, B. Fornal, G. F. Grinyer, N. Hoteling, B. P. Kay, T. Lauritsen, K. Minamisono, I. Ştefânescu, J. Stoker, W. B. Walters, S. Zhu,

Nuclear Physics and Applications

The isomeric and $\ensuremath{\beta}$-decay properties of neutron-rich $^{53\ensuremath{-}57}\mathrm{Sc}$ and $^{53,54}\mathrm{Ca}$ nuclei near neutron number $N=32$ are reported, and the low-energy level schemes of $^{53,54,56}\mathrm{Sc}$ and $^{53\ensuremath{-}57}\mathrm{Ti}$ are presented. The low-energy level structures of the ${}_{21}\mathrm{Sc}$ isotopes are discussed in terms of the coupling of the valence $1{f}_{7/2}$ proton to states in the corresponding ${}_{20}\mathrm{Ca}$ cores. Implications with respect to the robustness of the $N=32$ subshell closure are discussed, as well as the repercussions for a possible $N=34$ subshell closure.